This hilarious play is about three middle-aged sisters. Vanya and Sonia live together in Bucks County, Pennsylvania, when suddenly, Masha, their movie-star sister, moves in with her new boyfriend, Spike. Their old sister issues flare up and a new, young actress appears that worries the imperious Masha. Atlantic Stage, 900 79th Ave. N. Thursdays–Saturdays, 7:30 p.m.; Sundays, 3 p.m. $17.50–$27.50. (877) 287-8587, www.atlanticstage.com